Safari 1.x is vulnerable to IDN ppoofing according to Secunia. You can read more about the problem and test your browser at Multiple Browsers IDN Spoofing Test. Saft 7.5.1 and the free version Saft Lite fix this problem in waiting for Apple to release a security update for this.
Thanks Robert Goldsmith for pointing to the IDN spoofing problem.

New feature: IDN spoofing detection (http://secunia.com/multiple_browsers_idn_spoofing_test)
Improvement: Minor fixes of localization problems
Improvement: Export PDF contextual menu moved to lower part

Go to Saft home and download it.